How to disable Telnet on Cisco Switches and Routers

Telnet protocol enables users to remotely connect to Cisco devices and it is enabled by default on most Cisco device. However it is not very secure to enable Telnet on your Cisco device as the login information and commands are sent in clear text and can be easily hacked. It is recommended to use SSH for remote access as this gives you secure, encrypted connection to your Cisco device.

This article demonstrates how to disable Telnet Protocol on a Cisco Router ( the same applies to all Cisco IOS devices)

To disable Telnet and enable only SSH connections:

First login to the Cisco Switch or Router and enter configuration mode